package cn.achao.csr.log.aspect;

import cn.achao.csr.api.model.dto.OperaAddDTO;
import cn.achao.csr.base.constant.SecurityConstants;
import cn.achao.csr.base.utils.ServletUtils;
import cn.achao.csr.base.utils.StringUtils;
import cn.achao.csr.log.annotation.CsrLog;
import cn.achao.csr.log.enums.BusinessStatus;
import cn.achao.csr.log.filter.PropertyPreExcludeFilter;
import cn.achao.csr.log.service.AsyncLogService;
import cn.achao.csr.security.utils.SecurityUtils;
import com.alibaba.fastjson2.JSON;
import lombok.RequiredArgsConstructor;
import org.apache.commons.lang3.ArrayUtils;
import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.annotation.AfterReturning;
import org.aspectj.lang.annotation.AfterThrowing;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.core.NamedThreadLocal;
import org.springframework.http.HttpMethod;
import org.springframework.stereotype.Component;
import org.springframework.validation.BindingResult;
import org.springframework.web.multipart.MultipartFile;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import java.time.LocalDateTime;
import java.util.Collection;
import java.util.Map;

/**
 * 操作日志记录处理
 *
 * @author achao
 */
@Aspect
@Component
@RequiredArgsConstructor
public class LogAspect {
    private static final Logger log = LoggerFactory.getLogger(LogAspect.class);

    /** 排除敏感属性字段 */
    public static final String[] EXCLUDE_PROPERTIES = {"password", "oldPassword", "newPassword", "confirmPassword"};

    /** 计算操作消耗时间 */
    private static final ThreadLocal<Long> TIME_THREADLOCAL = new NamedThreadLocal<Long>("Cost Time");

    private final AsyncLogService asyncLogService;

    /**
     * 处理请求前执行
     */
    @Before(value = "@annotation(controllerCsrLog)")
    public void boBefore(JoinPoint joinPoint, CsrLog controllerCsrLog) {
        TIME_THREADLOCAL.set(System.currentTimeMillis());
    }

    /**
     * 处理完请求后执行
     *
     * @param joinPoint 切点
     */
    @AfterReturning(pointcut = "@annotation(controllerCsrLog)", returning = "jsonResult")
    public void doAfterReturning(JoinPoint joinPoint, CsrLog controllerCsrLog, Object jsonResult) {
        handleLog(joinPoint, controllerCsrLog, null, jsonResult);
    }

    /**
     * 拦截异常操作
     *
     * @param joinPoint 切点
     * @param e 异常
     */
    @AfterThrowing(value = "@annotation(controllerCsrLog)", throwing = "e")
    public void doAfterThrowing(JoinPoint joinPoint, CsrLog controllerCsrLog, Exception e) {
        handleLog(joinPoint, controllerCsrLog, e, null);
    }

    protected void handleLog(final JoinPoint joinPoint, CsrLog controllerCsrLog, final Exception e, Object jsonResult) {
        try {
            // *========数据库日志=========*//
            OperaAddDTO operLog = new OperaAddDTO();
            operLog.setStatus(BusinessStatus.SUCCESS.ordinal());
            // 请求的地址
            operLog.setOperaUrl(StringUtils.substring(ServletUtils.getRequest().getRequestURI(), 0, 255));
            String username = SecurityUtils.getUsername();
            if (StringUtils.isBlank(username)) {
                username = SecurityConstants.INNER;
            }
            operLog.setOperaName(username);

            if (e != null) {
                operLog.setStatus(BusinessStatus.FAIL.ordinal());
                operLog.setErrorMsg(StringUtils.substring(e.getMessage(), 0, 2000));
            }
            // 设置方法名称
            String className = joinPoint.getTarget().getClass().getName();
            String methodName = joinPoint.getSignature().getName();
            operLog.setMethod(className + "." + methodName + "()");
            // 设置请求方式
            operLog.setRequestMethod(ServletUtils.getRequest().getMethod());
            // 处理设置注解上的参数
            getControllerMethodDescription(joinPoint, controllerCsrLog, operLog, jsonResult);
            // 设置消耗时间
            operLog.setCostTime(System.currentTimeMillis() - TIME_THREADLOCAL.get());
            // 设置操作时间
            operLog.setOperaTime(LocalDateTime.now());
            // 保存数据库
            asyncLogService.saveSysLog(operLog);
        } catch (Exception exp) {
            // 记录本地异常日志
            log.error("异常信息:{}", exp.getMessage());
            exp.printStackTrace();
        } finally {
            TIME_THREADLOCAL.remove();
        }
    }

    /**
     * 获取注解中对方法的描述信息 用于Controller层注解
     *
     * @param csrLog 日志
     * @param operLog 操作日志
     * @throws Exception
     */
    public void getControllerMethodDescription(JoinPoint joinPoint, CsrLog csrLog, OperaAddDTO operLog, Object jsonResult) throws Exception {
        // 设置action动作
        operLog.setBusinessType(csrLog.businessType().ordinal());
        // 设置标题
        operLog.setTitle(csrLog.title());
        // 设置操作人类别
        operLog.setOperatorType(csrLog.operatorType().ordinal());
        // 是否需要保存request，参数和值
        if (csrLog.isSaveRequestData()) {
            // 获取参数的信息，传入到数据库中。
            setRequestValue(joinPoint, operLog, csrLog.excludeParamNames());
        }
        // 是否需要保存response，参数和值
        if (csrLog.isSaveResponseData() && StringUtils.isNotNull(jsonResult)) {
            operLog.setRespResult(StringUtils.substring(JSON.toJSONString(jsonResult), 0, 2000));
        }
    }

    /**
     * 获取请求的参数，放到log中
     *
     * @param operLog 操作日志
     * @throws Exception 异常
     */
    private void setRequestValue(JoinPoint joinPoint, OperaAddDTO operLog, String[] excludeParamNames) throws Exception {
        Map<?, ?> paramsMap = ServletUtils.getParamMap(ServletUtils.getRequest());
        String requestMethod = operLog.getRequestMethod();
        if (StringUtils.isEmpty(paramsMap) && StringUtils.equalsAny(requestMethod, HttpMethod.PUT.name(), HttpMethod.POST.name(), HttpMethod.DELETE.name())) {
            String params = argsArrayToString(joinPoint.getArgs(), excludeParamNames);
            operLog.setReqParam(StringUtils.substring(params, 0, 2000));
        } else {
            operLog.setReqParam(StringUtils.substring(JSON.toJSONString(paramsMap, excludePropertyPreFilter(excludeParamNames)), 0, 2000));
        }
    }

    /**
     * 参数拼装
     */
    private String argsArrayToString(Object[] paramsArray, String[] excludeParamNames) {
        String params = "";
        if (paramsArray != null && paramsArray.length > 0) {
            for (Object o : paramsArray) {
                if (StringUtils.isNotNull(o) && !isFilterObject(o)) {
                    try {
                        String jsonObj = JSON.toJSONString(o, excludePropertyPreFilter(excludeParamNames));
                        params += jsonObj.toString() + " ";
                    } catch (Exception e) {
                    }
                }
            }
        }
        return params.trim();
    }

    /**
     * 忽略敏感属性
     */
    public PropertyPreExcludeFilter excludePropertyPreFilter(String[] excludeParamNames) {
        return new PropertyPreExcludeFilter().addExcludes(ArrayUtils.addAll(EXCLUDE_PROPERTIES, excludeParamNames));
    }

    /**
     * 判断是否需要过滤的对象。
     *
     * @param o 对象信息。
     * @return 如果是需要过滤的对象，则返回true；否则返回false。
     */
    @SuppressWarnings("rawtypes")
    public boolean isFilterObject(final Object o) {
        Class<?> clazz = o.getClass();
        if (clazz.isArray()) {
            return clazz.getComponentType().isAssignableFrom(MultipartFile.class);
        } else if (Collection.class.isAssignableFrom(clazz)) {
            Collection collection = (Collection) o;
            for (Object value : collection) {
                return value instanceof MultipartFile;
            }
        } else if (Map.class.isAssignableFrom(clazz)) {
            Map map = (Map) o;
            for (Object value : map.entrySet()) {
                Map.Entry entry = (Map.Entry) value;
                return entry.getValue() instanceof MultipartFile;
            }
        }
        return o instanceof MultipartFile || o instanceof HttpServletRequest || o instanceof HttpServletResponse
                || o instanceof BindingResult;
    }
}
